Research PDP7 development

[unix-history] / dmabs.s

diff --git a/dmabs.s b/dmabs.s
new file mode 100644 (file)
index 0000000..fce7825
--- /dev/null
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+   " dmabs
+
+   lac o17
+   sys creat; punout
+   spa
+   sys save
+   dac fo
+   lac 017777
+   tad d1
+   dac name
+   jms space
+   100
+
+loop:
+   dzm oldsum
+   lac initcmd
+   dac comand
+   lac i 017777
+   sad d4
+   jmp stop
+   tad dm4
+   dac i 017777
+   lac name
+   tad d4
+   dac name
+
+dump1:
+   lac comand
+   xor dactra
+   dac tracmd
+
+dump2:
+   sys open; name: 0; 0
+   spa
+   jmp opnerr
+   dac fi
+   -bootsiz
+   dac c1
+   law boot-1
+   dac 8
+1:
+   lac i 8
+   jms put
+   isz c1
+   jmp 1b
+   lac bootcmd
+   lrs 12
+   jms put1
+   lac bootcmd
+   lrs 6
+   jms put1
+   lac bootcmd
+   and o77
+   xor o300
+   jms put2
+
+   jms space
+   3
+
+dump3:
+   -1
+   tad bufp
+   dac 8
+   -64
+   dac c1
+1:
+   dzm i 8
+   isz c1
+   jmp 1b
+   lac fi
+   sys read; bufp: buf; 64
+   sna
+   jmp done
+   dac count
+   -1
+   tad bufp
+   dac 8
+   -64
+   dac c1
+   cla
+1:
+   add i 8
+   isz c1
+   jmp 1b
+   sna
+   jmp dump4
+   dac newsum
+   lac comand
+   jms put
+   lac count
+   jms put
+   lac oldsum
+   add comand
+   add count
+   jms put
+   lac newsum
+   dac oldsum
+   jms space
+   3
+   -1
+   tad bufp
+   dac 8
+   -1
+   tad count
+   cma
+   dac c1
+1:
+   lac i 8
+   jms put
+   isz c1
+   jmp 1b
+   jms space
+   10
+
+dump4:
+   lac comand
+   tad count
+   dac comand
+   jmp dump3
+
+done:
+   lac tracmd
+   jms put
+   cla
+   jms put
+   lac oldsum
+   add tracmd
+   jms put
+   jms space
+   20
+   lac fi
+   sys close
+   jmp loop
+
+stop:
+   cla
+   jms put
+   jms space
+   100
+   sys exit
+
+space: 0
+   -1
+   tad i space
+   cma
+   dac c1
+   isz space
+1:
+   lac o400
+   jms put2
+   isz c1
+   jmp 1b
+   jmp i space
+
+put: 0
+   dac 1f
+   lrs 12
+   jms put1
+   lac 1f
+   lrs 6
+   jms put1
+   lac 1f
+   jms put1
+   jmp i put
+1:0
+
+put1:0
+   and o77
+   xor o200
+   jms put2
+   jmp i put1
+
+put2: 0
+   dac 1f
+   lac fo
+   sys write; 1f; 1
+   jmp i put2
+1: 0
+
+boot:
+   org = 017740
+2:
+   jms get1-boot+org
+   dac cmd-boot+org
+   jms get1-boot+org
+   cma
+   dac cnt-boot+org
+   jms get2-boot+org
+   xor sum-boot+org
+   dzm sum-boot+org
+   cla cll sza
+   hlt
+   isz cnt-boot+org
+1:
+   jms get1-boot+org
+cmd: 0
+   isz cmd-boot+org
+   isz cnt-boot+org
+   jmp 1b-boot+org
+   jmp 2b-boot+org
+get1: 0
+   jms get2-boot+org
+   dac get2-boot+org
+   add sum-boot+org
+   dac sum-boot+org
+   lac get2-boot+org
+   jmp i get1-boot+org
+get2: 0
+   iot 0144
+1:
+   iot 0101
+   jmp 1b-boot+org
+   iot 0112
+   jmp i get2-boot+org
+sum: 0
+   cnt = sum+1
+   bootsiz = .-boot
+bootcmd: jmp org
+
+opnerr:
+   lac name
+   dac 1f
+   lac d1
+   sys write; 1: 0; 4
+   lac d1
+   sys write; mes; 2
+   jmp loop
+mes:
+   040;077012
+
+comand: 0
+tracmd: 0
+   d1: 1
+.17777: 017777
+o77: 077
+o200: 0200
+o300: 0300
+d4: 4
+d64: 64
+dm4: -4
+o400: 0400
+punout: <pp>;<to>;<ut>;040040
+o17: 017
+
+fi: 0
+fo: 0
+count: 0
+oldsum: 0
+newsum: 0
+daccmd: dac
+dactra: dac jmp
+initcmd: dac 0
+c1: 0
+buf:
+
+iot = 0700000
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